CI: Refresh Ubuntu Focal container as 20.04-x86_64

As with 16.04 (Xenial), with python3-setuptools included.  Having this package
only in some containers was intentional; see commit bbc72a7877 ("automation:
Add python3's setuptools to some containers") for the rational.

This saves ~500M:

  registry.gitlab.com/xen-project/xen/ubuntu    20.04-x86_64           1.06GB
  registry.gitlab.com/xen-project/xen/ubuntu    focal                  1.57GB

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>
Release-Acked-By: Oleksii Kurochko <oleksii.kurochko@gmail.com>

automation/build/ubuntu/20.04-x86_64.dockerfile

@@ -0,0 +1,72 @@
+# syntax=docker/dockerfile:1
+FROM --platform=linux/amd64 ubuntu:20.04
+LABEL maintainer.name="The Xen Project"
+LABEL maintainer.email="xen-devel@lists.xenproject.org"
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN <<EOF
+#!/bin/bash
+    set -e
+
+    useradd --create-home user
+
+    apt-get -y update
+
+    DEPS=(
+        # Xen
+        bison
+        build-essential
+        checkpolicy
+        clang
+        flex
+        python3-minimal
+
+        # Tools (general)
+        ca-certificates
+        git-core
+        gzip
+        patch
+        perl
+        pkg-config
+        wget
+        # libxenguest dombuilder
+        libbz2-dev
+        libzstd-dev
+        liblzo2-dev
+        liblzma-dev
+        zlib1g-dev
+        # libacpi
+        acpica-tools
+        # libxl
+        uuid-dev
+        libyajl-dev
+        # RomBIOS
+        bcc
+        bin86
+        # xentop
+        libncurses5-dev
+        # Python bindings
+        python3-dev
+        python3-setuptools
+        # Ocaml bindings/oxenstored
+        ocaml-nox
+        ocaml-findlib
+
+        # Stubdom download/extract
+        bzip2
+
+        # Qemu build
+        libglib2.0-dev
+        libpixman-1-dev
+        meson
+        ninja-build
+        python3-packaging
+    )
+
+    apt-get -y --no-install-recommends install "${DEPS[@]}"
+    rm -rf /var/lib/apt/lists/*
+EOF
+
+USER user
+WORKDIR /build

automation/build/ubuntu/focal.dockerfile

@@ -1,49 +0,0 @@
-# syntax=docker/dockerfile:1
-FROM --platform=linux/amd64 ubuntu:20.04
-LABEL maintainer.name="The Xen Project " \
-      maintainer.email="xen-devel@lists.xenproject.org"
-
-ENV DEBIAN_FRONTEND=noninteractive
-ENV USER root
-
-RUN mkdir /build
-WORKDIR /build
-
-# build depends
-RUN apt-get update && \
-    apt-get --quiet --yes install \
-        build-essential \
-        zlib1g-dev \
-        libncurses5-dev \
-        python3-dev \
-        python3-setuptools \
-        uuid-dev \
-        libyajl-dev \
-        libaio-dev \
-        libglib2.0-dev \
-        clang \
-        libpixman-1-dev \
-        pkg-config \
-        flex \
-        bison \
-        acpica-tools \
-        bin86 \
-        bcc \
-        liblzma-dev \
-        libnl-3-dev \
-        ocaml-nox \
-        libfindlib-ocaml-dev \
-        # libsystemd-dev for Xen < 4.19
-        libsystemd-dev \
-        transfig \
-        pandoc \
-        checkpolicy \
-        wget \
-        git \
-        nasm \
-        # QEMU
-        ninja-build \
-        && \
-        apt-get autoremove -y && \
-        apt-get clean && \
-        rm -rf /var/lib/apt/lists* /tmp/* /var/tmp/*

automation/gitlab-ci/build.yaml

@@ -625,25 +625,25 @@ ubuntu-18.04-x86_64-gcc-debug:
   variables:
     CONTAINER: ubuntu:18.04-x86_64
 
-ubuntu-focal-gcc:
+ubuntu-20.04-x86_64-gcc:
   extends: .gcc-x86-64-build
   variables:
-    CONTAINER: ubuntu:focal
+    CONTAINER: ubuntu:20.04-x86_64
 
-ubuntu-focal-gcc-debug:
+ubuntu-20.04-x86_64-gcc-debug:
   extends: .gcc-x86-64-build-debug
   variables:
-    CONTAINER: ubuntu:focal
+    CONTAINER: ubuntu:20.04-x86_64
 
-ubuntu-focal-clang:
+ubuntu-20.04-x86_64-clang:
   extends: .clang-x86-64-build
   variables:
-    CONTAINER: ubuntu:focal
+    CONTAINER: ubuntu:20.04-x86_64
 
-ubuntu-focal-clang-debug:
+ubuntu-20.04-x86_64-clang-debug:
   extends: .clang-x86-64-build-debug
   variables:
-    CONTAINER: ubuntu:focal
+    CONTAINER: ubuntu:20.04-x86_64
 
 opensuse-leap-15.6-clang:
   extends: .clang-x86-64-build

automation/scripts/containerize

@@ -29,7 +29,6 @@ case "_${CONTAINER}" in
     _archlinux|_arch) CONTAINER="${BASE}/archlinux:current" ;;
     _centos7) CONTAINER="${BASE}/centos:7" ;;
     _fedora) CONTAINER="${BASE}/fedora:29";;
-    _focal) CONTAINER="${BASE}/ubuntu:focal" ;;
     _bullseye-ppc64le) CONTAINER="${BASE}/debian:11-ppc64le" ;;
     _bookworm-ppc64le) CONTAINER="${BASE}/debian:12-ppc64le" ;;
     _bullseye-riscv64) CONTAINER="${BASE}/debian:11-riscv64" ;;
@@ -44,6 +43,7 @@ case "_${CONTAINER}" in
     _opensuse-tumbleweed|_tumbleweed) CONTAINER="${BASE}/opensuse:tumbleweed-x86_64" ;;
     _xenial) CONTAINER="${BASE}/ubuntu:16.04-x86_64" ;;
     _bionic) CONTAINER="${BASE}/ubuntu:18.04-x86_64" ;;
+    _focal)  CONTAINER="${BASE}/ubuntu:20.04-x86_64" ;;
 esac
 
 # Use this variable to control whether root should be used